The following is a new range of high voltage ( up to 330kV) instrument transformers.
This consists of Outdoor current transformer, voltage transformers VT and capacitor voltage transformers CTs.
These instrument transformers are mainly mineral oil insulated but SF6 insulated transformers are also available.
Item 1 – Cast Resin type Isolation Transformer | HV Winding 1 | LV Winding 1 | LV Winding 2 | |
Rated power | kVA | 315 | 1250 | 1250 |
Rated voltage | kV | 33 | 0.48 | 0.48 |
Frequency | Hz | 50 | ||
Off circuit tapping links | % | ±2.5%, +-5% | Nil | Nil |
Connection | Delta | Star | Star | |
Vector group | Dy11y11 | |||
Insulation level (Maximum BIL/AC) | kV | 150/70 | 10/3 | 10/3 |
Winding material | Aluminium cast windings in quartz filled self-extinguishing epoxy resin | Aluminium cast windings in quartz filled self-extinguishing epoxy resin | Aluminium cast windings in quartz filled self-extinguishing epoxy resin | |
Type of winding | Vacuum Resin Cast | Vacuum Resin cast | Vacuum Resin cast | |
Standard | AS 60076-11, AS 2374 | |||
Installation | Indoor | |||
Degree of protection | IP22 | |||
Type of cooling | AN/AF | |||
Installation altitude | < 1000 a.m.s.l | |||
Climatic/environmental And fire behaviour class | E2-C2-F1 | |||
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